Duplicating machine



W. GHIPPERFIELD DUPLICATING MACHINE Filed Apr. 15, 192,1

H'HIH il H PatentedV Apr. 1o, 1923.

dentran stares; rarest' WALTERCHIPPERFIELD, F HORNCURCH; ENGLAND, nssIGlvoR To A. BL'JICKV.

compartir, on CHICAGO, ILLINOIS, A'coRPoRA'rIon or ILLIlvoiis.

DUPLICATILNQMACHINE.

(GRANTED UNDER THE marismas ,0F 'THE ACT onMAReH 3, 1,921, 4 1 STAT. L., 15u13) To all whom z't may concerti.: l I

Be it known that l, WAL'ruR Cnirrnnrinnn, a subject'jof the King of Great Britain, re-

siding vat l'Kinkora Great Nelmes., vHorn- 5 church, Essex, England, have invented rertain newand useful Improvements in Duplieating Machines (for wliichl have filed an application inGrea't Britain January 19.

' 1920, No. 1,648,l Patent No. 162,053), of y which the' following is a specification.

'My invention relates to improvements in and relating to duplicating and like rotary printing machines. It has for its object the.

provisioltof suitable means for effecting rertain adjustments, to provide the correct head spacingr and fine line adjustments ner essary in such machines. ln machines of' this type the printing Cylinder usually rn oeives its motion from a spur gear which may be fitted loosely upon a boss secured to or formed integral With oneqof the sido plates of the cylinder. Connection between the :eylinder' and the spur gear has been provided byineans of removable devices Such as clamps which are operated by means of a key, `them'ovement of whirh in a counterfclockwise 'direction hasl released the clamp from binding contact with the cylinder Wall. `When the elampihas been released,

the oylirider may be moved in either direction, independently of the spur gear, for

l regulation of the head space on the sheets' on which copies are made.` .I

` Such' anarrangement haseer`tain drsad- 354 vantages, among which the possible slipping of the cylinder may he mentioned, and

the necessity of Considerable skill on {the partof'the operator in order to gauge the.

exaotainount of movement necessary to the 40 c linder to obtain the head space required..

ith suoh devicesalso it basl-been almost impossible to obtaln a very fine line adjustment.

By my present 1nve1'1t1on means are provided for., obtaining, 'the required adjust# the amountof skill required in A(halting thevv l adjustments. 5o

In order ithat my invention maybe more' i clearly understood attention is ,he-reby-di-` rectedto the accompanying drawings formiurr part .of this application and illustrating one enihodiment of my invention. drawings Fig. 1 represents a` side elevation 'of the printing' cylinder ofia rotary duplivf, rating machine` embodying my invention;-v Fig. .2 is a partial side view threofvand.

Figs. 3 and 4, are sections taken repeotively e0.

on`the lines 3.-.3 and 44-4 of Fig2', showincertain details ofthe coustrut'ztit'jn.v eferring' ltothe dra-wings, in the con-` struction illustrated the main spur'gear. 1

is mounted upon a vboss formed von Ionsel (fm-ed to one of the side walls 2 of the-print'- ing cylinder 3 of a rotary duplicatingma- 'chine. `(iear 1f is provided with a boss olly".

flange, `oom'entric wijth'gear 1, on'which is-f i loosely mounted a toothed wheeler gear 4.- 70 'lhe teeth of this wheel normally mesh with the teeth of arack formed on a lever 55;. which is pivoted at one end on a pin 6,'Which is carried by cylinder-3, the-teeth ofwheel 4 I and rack 5 lpreferably beinginachine-cut.

The free end' of `the rack lever ,5 is slotted l. as is shown at T for the receptionof a pint?l carried hy' a crank .9 which is.seeured to a4 spindlelO. This spindle is rotatably mount- In the 55j,

ed .in the sidedises 2, 2v of the cylinder, ad- S0 jacent to the-periphery of the cylinder. --Tjhe lever 5 isnormallyheld by spring pressure in position such that teeth' 5 will merhi with the teeth 'of wheelv 4'. This may be effeeted by the; provision Jof an arm 11 on 85 spindle 10, the upper end of tliisarm being normally held inthe position indicated in dotted' lines in Fig. 2 hymeans of a Spring 12 which may be secured-to a pin'13 on the inner surface of' one of the lend plates 2 of the cylinder. This spring exerts rotative effect on spindle 10 to hold pin 8 in the position shown inFigr.l 2 in which 'the teeth of rack 5( will mesh. with the teeth of. wheel 4 to constitute' a 'positive' or driving connec- 95 tion between gear 1 and cylinder 3.

.to crank 9 to force down the rack lever 5 so that the teeth thereon are .freed from the 'teeth of wheel 4, whereupon the printing cylinder may be moved in either direction to effect the required head s-pace independently of gear 1. On releasing hand lever 14, spring 12 turns spindle 10 in the opposite direction to cause the teeth of rack lever 5 to reengage 'the teeth of wheel 4 and so restore the driving connection between the printing cylinder andV its gear 1.

'A very fine line adjustment may be obtained by means which permit slight graduated angular adjustments between gear 1 and wheel 4. ln the construction shown a pin 15 extends outwardly from wheel 4, the latter preferably having a slot-formed there .inv within which-the squared end of pin 15 is inserted. Gear 1 is-provided with a cylindri- 'v cal opening therethrough through which ex- A a knob 18 and a tion of a printing cylinder,

'Y driving train therefor, a lever said cyliizider,y having rack teet tends a cylindrical'member 16 which has as. hand lever 17 secured to or'formed integralw-ith the outer'end of the same".` yMember 16 is provided .with an eccentrically disposed bore into which pin 15 extends. The outer or upper end of handlever 17 is provided with' pin 19 which registers with a series `of openings 20 drilled into or through. gear 1 adjacent the peri heryythereof. f

Pin19 may be freedV rom one of the perforations 20 and again inserted in a'different perforation 20 after .arm 17 has `been swung through a desired angle, This may be accomplished, for example, by moving the Y sleeve member 16 outwardly over pin 15' to free push the sleeve member 16 inwardly when pin'19 from its opening 20 and again pin 19 is in the proper adjusted position. As arm 17 swings from one vposition to another, pin 15 is moved through `a much smaller distance, angularly, because of its `connection with arm 17, close to thepivotal point thereof, this being effected by the eccentric mounting of pin 15 in pivot member 16. n the 'preferred arrangement, the move ment of arm 17 from one end to the other of thefseries of perforations 2O is sufficient toretate wheel 4, and accordingly cylinder 3, relatively to gear 1, an amount approximatelyjequal to one tooth of wheel 4. Accordingly, movement of arm 17 from one opening' 2() to the `next adjacent opening in Aeither direction a'ords an extremely mi ute Amovement of cylinder and thus a y ry -f ineldegree of adjustment is obtained. 29

`What claim is 1. 1n duplicating machines, the .combinaa gear in the jivoted to thereon,

laid gear, a hand adapted to mesh with said gear, spring means for holding said teeth in mesh with lever on the exterior of said cylinder, and means operated by said hand lever for swinging said rack lever away from said gear.

2. ln duplicatingl machines, the combina'- tion of a printing cylinder, a gear in the driving train therefor', a lever pivoted to said cylinder, having rack teeth thereon,

adaptedy to 'mesh' with said gear, spring means for4 holding said teeth in mesh with said gean, aspindle carried by said cylinder,

.an arm on said spindle, having a pin adapted to coact with said lever to'swing the same away from said gear, and a hand lever en the exterior of said cylinder for oscillating said spindle. i f

3. ln duplicating machines, the combination of a printing cylinder, a spur gear in the driving train thereof, having a boss', a toothed wheel loosely mounted on said boss,

means forl eiecting fine adjustments between the relative angular positions of said gear and wheel, and securing the same together, a lever pivoted to said cylinder having rack teeth adapted to mesh with said toothed wheel, spring means for holding said teeth in mesh with said wheel, and hand operated means for. swinging said lever away from said wheel. I

4. In duplicating machines, the combination 'of a printing cylinder, a spur gearin the driving train thereof, having a boss, a toothed wheel loosely mounted. on said boss, means for edecting line adjustments between the-relative angular positions of said ear and wheel, and securing the same together, toothed means for effecting a driving Aconnection between said wheel and cylinder,

and hand operated means for moving said toothed meansout of mesh with said wheel, for adjusting the relative angular positions of said cylinder and toothed wheel.

5. In duplcating machines, the combination of a printing cylinder, a spur gear in the driving train thereof, having ay boss, a toothed wheel loosely mounted on said boss, means including a rack normally in mesh with said wheel for maintaining a driving connection between said wheel and said cylinder, and means foradjusting the relative angular positions of said cylinder and= toothedv wheel while said rack is in mesh with said gear, said means ycomprising a pin extending from said wheel parallel to the axis thereof, an arm pivoted. on said I ear, adapted' to swing over thel face thereoiengaging said pin, and means for securing the end of said arm to said gear in diiierent angular positions.

'6. In duplicating machines, the combination of a printing cylinder, a spur gear in the driving train thereof, a rotary member,

rec l coaxial with said gear, for driving said c 1- inder therefrom, said gear having a eyhndrical opening therethrough, parallel to its axis, a cylindrical member rota'tively mounted-in said opening, having an eccentric-bore, a pin secured to sad'rotary member, extending into said bore, a hand operated arm on the outer end of said cylindrical member, adapted to swing over the face of' said gear, and means `for securing the outer 10 end of said arm to said gear at different anguiar-1y spaced points adj agent the periphery of the gear. This speciicatin signed this 18th day of March, 1921. A

WALTER CHIPPERFIELD. 

